Rough Sets, Fuzzy Sets, Data Mining and Granular Computing: by Andrzej Jankowski, Andrzej Skowron (auth.), Aijun An, Jerzy

By Andrzej Jankowski, Andrzej Skowron (auth.), Aijun An, Jerzy Stefanowski, Sheela Ramanna, Cory J. Butz, Witold Pedrycz, Guoyin Wang (eds.)

This quantity includes the papers chosen for presentation on the eleventh Int- nationwide convention on tough units, Fuzzy units, facts Mining, and Granular Computing (RSFDGrC 2007), part of the Joint tough Set Symposium (JRS 2007) equipped by way of Infobright Inc. and York collage. JRS 2007 was once held for the ?rst time in the course of may perhaps 14–16, 2007 in MaRS Discovery District, Toronto, Canada. It consisted of 2 meetings: RSFDGrC 2007 and the second one Int- nationwide convention on tough units and information know-how (RSKT 2007). the 2 meetings that constituted JRS 2007 investigated tough units as an rising method verified greater than 25 years in the past by way of Zdzis legislation Pawlak. Roughsettheoryhasbecomeanintegralpartofdiversehybridresearchstreams. in line with this development, JRS 2007 encompassed tough and fuzzy units, kno- edgetechnologyanddiscovery,softandgranularcomputing,dataprocessingand mining, whereas keeping an emphasis on foundations and purposes. RSFDGrC 2007 within the footsteps of well-established overseas projects dedicated to the dissemination of tough units examine, held to this point in Canada, China, Japan, Poland, Sweden, and america. RSFDGrC used to be ?rst - ganized because the seventh overseas Workshop on tough units, facts Mining and Granular Computing held in Yamaguchi, Japan in 1999. Its key characteristic was once to emphasize the function of integrating clever details easy methods to remedy real-world, huge, complicated difficulties keen on uncertainty and fuzziness. RSFDGrC accomplished the prestige of a bi-annual foreign convention, ranging from 2003 in Chongqing, China.

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Distributed Data Mining: Algorithms, Systems, and Applications. Data Mining Handbook. IEA Publisher (2002) 341-358. 11. Moore, R.. Knowledge-based Grids. Proc. of the 18th IEEE Symposium on Mass Storage Systems and 9th Goddard Conference on Mass Storage Systems and Technologies, San Diego, USA (2001). 12. : From TeraGrid to Knowledge Grid. Communications of the ACM, vol. 44 n. 11 (2001) 27-28. 13. : Computational and Data Grids in Large Scale Science and Engineering. Future Generation Computer Systems vol.

Obviously, there may be many possible reductions of C. If RED (C) is used to express all the reductions of C, below is a theorem. Theorem 1: The core of an equivalence relation family C is equal to the intersection of all the reductions of C, that is CORE C = RED(C). ()∩ Definition 7: Tables with distinguished condition and decision attributes are referred to as decision tables. Definition 8: Every dependency, C=> k D, can be described by a set of decision rules in the form “If . . then”. Given any y x, if dx|C=dy|C implicates that dx|D=dy|D, the decision rule is consistent; otherwise the rule is inconsistent.

Finally, the global result is obtained by exchanging all the local models information. These three strategies for parallelizing data mining algorithms are not necessarily alternative. In fact, they can be combined to improve both performance and accuracy of results. For completeness, we say also that in combination with strategies for parallelization, different data partition strategies may be used : (i) sequential partitioning (separate partitions are defined without overlapping among them), (ii) cover-based partitioning (some data can be replicated on different partitions) and (iii) range-based query partitioning (partitions are defined on the basis of some queries that select data according to attribute values).

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